Naturalism is also a view about the nature of philosophy. According to many naturalists, philosophy is a certain sort of reflective attention to the sciences and it is continuous with them. They believe that philosophy's problems are not only motivated by the sciences, but in that its methods are fundamentally similar. There are two basic dimensions to Naturalism; what there is and methods of acquiring belief or knowledge. To define the first part, Naturalists such as Darwin believe that all what there is, what is studied by the non-human and human sciences is all there is, and the denial of the need for any explanation going outside our universe. Naturalism is a conception of reality that states that reality is homogeneous in the sense that there is one natural order, or metaphysic that comprises all of reality. To define the second part, Naturalists believe that the acquisition of belief and knowledge is a causal process within the natural order.